Zooplankton composition and distribution in the Lembeh Strait of North Sulawesi, Indonesia

Abstract

Based on oceanographic survey data in June 2012 in the Lembeh Strait, the zooplankton ecological characteristics such as species composition, individual abundance, dominant species and distribution were analyzed. The results showed that 183 species (including 4 sp.) had been recognized, most of them belonged to copepoda. Cnidaria followed with 43 species (including 1 sp.) were identified. The average abundance of zooplankton was (150.47±58.91) ind./m3. As to the horizontal distribution, the abundance of the zooplankton was higher in the southern waters than in the northern waters. The dominant species in the study area were Lensia subtiloides, Sagitta enflata, Lucifer intermedius, Oikopleura rufescens, Diphyes chamissoni, Creseis acicula, Subeucalanus subcrassus, Temora discaudata, Aglaura hemistoma, Doliolum denticulatum, Canthocalanus pauper, Oikopleura longicauda and Nanomia bijuga. Zooplankton biodiversity indexes were higher in study area than previous study in the other regions. The findings from this study provide important baseline information for future research and monitoring programs.

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Foundation item: The China-Indonesia Maritime Cooperation Fund Project “China-Indonesia Bitung Ecological Station Establishment”; the National Natural Science Foundation of China under contract No. 41306204; the Scientific Research Foundation of Third Institute of Oceanography, SOA under contract Nos 2017010, 2015012 and 2016012; the National Special Project on Gas Hydrate under contract No. GZH201100311.

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Acknowledgements

The authors are grateful to all the members of the cruise for their assistance during the sampling. The authors thank Hikmah Thoha from Research Center of Oceanography, Indonesian Institute of Sciences, Indonesia for providing the reference.

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